Question

how would you prepare 500ml of 70% of volume by volume aqueus solution of ethyl alchoal
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Answer 1

Answer:

70% volume by volume solution of ethyl alcohol of 500 ml will be made by addition of 350 ml ethyl alcohol and 150 ml water.

Explanation:

70%v/v solution mean presence of 70 ml alcohol in hundred ml solution. Which is turn in indicates presence of 30 ml water.

Now, to prepare 500 ml solution

100 ml contains 70 ml alcohol 500 ml will contain= 70/100×500ml

= 350 ml

Amount of water= 500-350ml

= 150 ml

Hope it helps you